<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h2>算术运算符</h2>
</body>
<script>
    let a1="18";
    let a2="100";
    let sum=a1/a2;

     console.log('sum:',sum)
    // let n1=0.2;
    // let n2=0.1;
    // console.log((n1*1000+n2*1000)/1000)

    
</script>
</html>